SERVICE MANUAL
This Service Manual is for the
LED22-T800M (A0C76EP) / LED22-H800M (A0C77EP) model.
For the LED22-T800M (A0C76EP) / LED22-H800M (A0C77EP) model, the
letter (A0C76EP) / (A0C77EP) is printed on the Serial Number Label on the
back of the unit. Refer to the Serial Number Label below.
Serial No. Label Serial No. Label
"A0C76EP" "A0C77EP"
22″ COLOR LCD TELEVISION
LED22-T800M
LED22-H800M
22″ COLOR LCD TELEVISION
LED22-T800M / LED22-H800M
TABLE OF CONTENTS
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Important Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Standard Notes for Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Cabinet Disassembly Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Electrical Adjustment Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
How to Initialize the LCD Television. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Firmware Renewal Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
Schematic Diagrams / CBA and Test Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1
Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1
Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-1
Mechanical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-1
Electrical Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-1
The LCD panel is manufactured to provide many years of useful life.
Occasionally a few non active pixels may appear as a tiny spec of color.
This is not to be considered a defect in the LCD screen.
1-1 A0C76SP
SPECIFICATIONS
< TUNER >
VHS/UHF Input ----------- 75Ω unbal., IEC Connector
Center IF ------------------- SECAM-L 38.9MHz, SECAM-L’ 33.9MHz
< LCD PANEL >
<DVB-T>
*1: modulation parameters = [8k 64QAM CR=2/3 GI=1/32]
*2: modulation parameters = [8k 16QAM CR=3/4 GI=1/8]
*3: modulation parameters = [2k 64QAM CR=2/3 GI=1/32]
*4: modulation parameters = [2k 16QAM CR=3/4 GI=1/32]
< VIDEO >
Description Condition Unit Nominal Limit
1. Video S/N 80 dB --- 40
2. Audio S/N --- dB --- 40/40
Description Condition Unit Nominal Limit
1. Number of Pixels Horizontal
Ver ti cal
pixels
pixels
1366
768
---
---
2. Viewing Angle Horizontal
Ver ti cal
°
°
---
---
-85 to 85
-80 to 80
Description Condition Unit Nominal Limit
1.
RECEIVED FREQ.RANGE
(-60dBm, 45ch.) *1, *2
+
-
kHz
kHz
1000
900
500
167
2. INPUT DYNAMIC
RANGE (mix./max)
c:*1 VHF HIGH 8ch.
UHF 45ch.
dBuV
dBuV
25/101
25/101
28/98
29/98
d:*2 VHF HIGH 8ch.
UHF 45ch.
dBuV
dBuV
18/101
18/101
21/98
21/98
3. C/N PERFORMANCE
(-50dBm)
c:*1 VHF HIGH 8ch.
UHF 45ch.
dB
dB
15
15 18
18
d:*2 VHF HIGH 8ch.
UHF 45ch.
dB
dB
11
11 14
14
4. MULTIPATH (-50dBm)
a. Performance with
short delay echoes
b. Performance with
long delay echoes
UHF 45ch.
c:*3
d:*4
c:*3
d:*4
dB
dB
dB
dB
18.7
14.0
19.1
13.0
23
20
23
18
Description Condition Unit Nominal Limit
1. Over Scan Horizontal
Ver tical
%
%
5
5
---
---
2. Color Temperature
AT 70% WHITE FIELD
x
y
°K 12000
0.272
0.278
---
±0.005
±0.005
3. Resolution Horizontal
Ver tical
line
line
400
350
---
---
4. HOME/RETAIL
BRIGHTNESS Ratio AT 100% WHITE FIELD % 60< ---
1-2 A0C76SP
< AUDIO >
All items are measured across 16 Ω load at speaker output terminal.
Note: Nominal specifications represent the design specifications. All units should be able to approximate these.
Some will exceed and some may drop slightly below these specifications. Limit specifications represent
the absolute worst condition that still might be considered acceptable. In no case should a unit fail to meet
limit specifications.
Description Condition Unit Nominal Limit
1. Audio Output Power 10% THD: Lch/Rch W 3.0/3.0 2.0/2.0
2. Audio Distortion 500mW: Lch/Rch % 1.5/1.5 3.0/3.0
3. Audio Freq. Response
-
6dB: Lch
-
6dB: Rch
Hz
Hz
70 to 8 k
70 to 8 k
---
---
4. Audio S/N Lch/Rch dB --- 45/45
2-1 LTVP_ISP
IMPORTANT SAFETY PRECAUTIONS
Prior to shipment from the factory, our products are strictly inspected for recognized product safety and electrical
codes of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally
important to implement the following precautions when a set is being serviced.
Safety Precautions for LCD TV
Circuit
1. Before returning an instrument to the
customer, always make a safety check of the
entire instrument, including, but not limited to, the
following items:
a. Be sure that no built-in protective devices are
defective and have been defeated during
servicing. (1) Protective shields are provided
on this chassis to protect both the technician
and the customer. Correctly replace all missing
protective shields, including any removed for
servicing convenience. (2) When reinstalling
the chassis and/or other assembly in the
cabinet, be sure to put back in place all
protective devices, including but not limited to,
nonmetallic control knobs, insulating
fishpapers, adjustment and compartment
covers/shields, and isolation resistor/capacitor
networks. Do not operate this instrument or
permit it to be operated without all
protective devices correctly installed and
functioning. Servicers who defeat safety
features or fail to perform safety checks
may be liable for any resulting damage.
b. Be sure that there are no cabinet openings
through which an adult or child might be able to
insert their fingers and contact a hazardous
voltage. Such openings include, but are not
limited to, (1) spacing between the LCD module
and the cabinet mask, (2) excessively wide
cabinet ventilation slots, and (3) an improperly
fitted and/or incorrectly secured cabinet back
cover.
c. Antenna Cold Check - With the instrument AC
plug removed from any AC source, connect an
electrical jumper across the two AC plug
prongs. Place the instrument AC switch in the
on position. Connect one lead of an ohmmeter
to the AC plug prongs tied together and touch
the other ohmmeter lead in turn to each tuner
antenna input exposed terminal screw and, if
applicable, to the coaxial connector. If the
measured resistance is less than 1.0 megohm
or greater than 5.2 megohm, an abnormality
exists that must be corrected before the
instrument is returned to the customer. Repeat
this test with the instrument AC switch in the off
position.
d. Leakage Current Hot Check - With the
instrument completely reassembled, plug the
AC line cord directly into a 230 V AC outlet. (Do
not use an isolation transformer during this
test.) Use a leakage current tester or a
metering system that complies with American
National Standards Institute (ANSI) C101.1
Leakage Current for Appliances and
Underwriters Laboratories (UL) 1410, (50.7).
With the instrument AC switch first in the on
position and then in the off position, measure
from a known earth ground (metal water pipe,
conduit, etc.) to all exposed metal parts of the
instrument (antennas, handle brackets, metal
cabinet, screw heads, metallic overlays, control
shafts, etc.), especially any exposed metal
parts that offer an electrical return path to the
chassis. Any current measured must not
exceed 0.5 milli-ampere. Reverse the
instrument power cord plug in the outlet and
repeat the test.
ANY MEASUREMENTS NOT WITHIN THE
LIMITS SPECIFIED HEREIN INDICATE A
POTENTIAL SHOCK HAZARD THAT MUST
BE ELIMINATED BEFORE RETURNING THE
INSTRUMENT TO THE CUSTOMER OR
BEFORE CONNECTING THE ANTENNA OR
ACCESSORIES.
2. Read and comply with all caution and safety-
related notes on or inside the receiver cabinet, on
the receiver chassis, or on the LCD module.
3. Design Alteration Warning - Do not alter or add
to the mechanical or electrical design of this LCD
TV receiver. Design alterations and additions,
including, but not limited to circuit modifications
and the addition of items such as auxiliary audio
and/or video output connections, might alter the
safety characteristics of this receiver and create a
hazard to the user. Any design alterations or
additions will void the manufacturer's warranty and
may make you, the servicer, responsible for
personal injury or property damage resulting
therefrom.
ALSO TEST WITH
PLUG REVERSED
USING AC
ADAPTER PLUG
AS REQUIRED
TEST ALL EXPOSED
METAL SURFACES
READING SHOULD
NOT BE ABOVE 0.5 mA
EARTH
GROUND
_
DEVICE
LEAKAGE
CURRENT
TESTER
+
BEING
TESTED
2-2 LTVP_ISP
4. Hot Chassis Warning -
a. Some TV receiver chassis are electrically
connected directly to one conductor of the AC
power cord and maybe safety-serviced without
an isolation transformer only if the AC power
plug is inserted so that the chassis is
connected to the ground side of the AC power
source. To confirm that the AC power plug is
inserted correctly, with an AC voltmeter,
measure between the chassis and a known
earth ground. If a voltage reading in excess of
1.0 V is obtained, remove and reinsert the AC
power plug in the opposite polarity and again
measure the voltage potential between the
chassis and a known earth ground.
b. Some TV receiver chassis normally have 85V
AC(RMS) between chassis and earth ground
regardless of the AC plug polarity. This chassis
can be safety-serviced only with an isolation
transformer inserted in the power line between
the receiver and the AC power source, for both
personnel and test equipment protection.
c. Some TV receiver chassis have a secondary
ground system in addition to the main chassis
ground. This secondary ground system is not
isolated from the AC power line. The two
ground systems are electrically separated by
insulation material that must not be defeated or
altered.
5. Observe original lead dress. Take extra care to
assure correct lead dress in the following areas: a.
near sharp edges, b. near thermally hot parts-be
sure that leads and components do not touch
thermally hot parts, c. the AC supply, d. high
voltage, and, e. antenna wiring. Always inspect in
all areas for pinched, out of place, or frayed wiring.
Check AC power cord for damage.
6. Components, parts, and/or wiring that appear to
have overheated or are otherwise damaged
should be replaced with components, parts, or
wiring that meet original specifications.
Additionally, determine the cause of overheating
and/or damage and, if necessary, take corrective
action to remove any potential safety hazard.
7. Product Safety Notice - Some electrical and
mechanical parts have special safety-related
characteristics which are often not evident from
visual inspection, nor can the protection they give
necessarily be obtained by replacing them with
components rated for higher voltage, wattage, etc..
Parts that have special safety characteristics are
identified by a ! on schematics and in parts lists.
Use of a substitute replacement that does not
have the same safety characteristics as the
recommended replacement part might create
shock, fire, and/or other hazards. The product's
safety is under review continuously and new
instructions are issued whenever appropriate.
Prior to shipment from the factory, our products
are strictly inspected to confirm they comply with
the recognized product safety and electrical codes
of the countries in which they are to be sold.
However, in order to maintain such compliance, it
is equally important to implement the following
precautions when a set is being serviced.
2-3 LTVP_ISP
Precautions during Servicing
A. Parts identified by the ! symbol are critical for
safety.
Replace only with part number specified.
B. In addition to safety, other parts and assemblies
are specified for conformance with regulations
applying to spurious radiation. These must also be
replaced only with specified replacements.
Examples: RF converters, RF cables, noise
blocking capacitors, and noise blocking filters, etc.
C. Use specified internal wiring. Note especially:
1) Wires covered with PVC tubing
2) Double insulated wires
3) High voltage leads
D. Use specified insulating materials for hazardous
live parts. Note especially:
1) Insulation Tape
2) PVC tubing
3) Spacers
4) Insulators for transistors.
E. When replacing AC primary side components
(transformers, power cord, etc.), wrap ends of
wires securely about the terminals before
soldering.
F. Observe that the wires do not contact heat
producing parts (heat sinks, oxide metal film
resistors, fusible resistors, etc.)
G. Check that replaced wires do not contact sharp
edged or pointed parts.
H. When a power cord has been replaced, check that
5~6 kg of force in any direction will not loosen it.
I. Also check areas surrounding repaired locations.
J. Use care that foreign objects (screws, solder
droplets, etc.) do not remain inside the set.
K. When connecting or disconnecting the internal
connectors, first, disconnect the AC plug from the
AC supply outlet.
L. When installing parts or assembling the cabinet
parts, be sure to use the proper screws and
tighten certainly.
2-4 LTVP_ISP
Safety Check after Servicing
Examine the area surrounding the repaired location
for damage or deterioration. Observe that screws,
parts and wires have been returned to original posi-
tions. Afterwards, perform the following tests and con-
firm the specified values in order to verify compliance
with safety standards.
1. Clearance Distance
When replacing primary circuit components, confirm
specified clearance distance (d) and (d') between sol-
dered terminals, and between terminals and surround-
ing metallic parts. (See Fig. 1)
Table 1 : Ratings for selected area
Note: This table is unofficial and for reference only.
Be sure to confirm the precise values.
2. Leakage Current Test
Confirm the specified (or lower) leakage current be-
tween B (earth ground, power cord plug prongs) and
externally exposed accessible parts (RF terminals, an-
tenna terminals, video and audio input and output ter-
minals, microphone jacks, earphone jacks, etc.).
Measuring Method : (Power ON)
Insert load Z between B (earth ground, power cord
plug prongs) and exposed accessible parts. Use an
AC voltmeter to measure across both terminals of load
Z. See Fig. 2 and following table.
Table 2: Leakage current ratings for selected areas
Note: This table is unofficial and for reference only. Be sure to confirm the precise values.
AC Line Voltage Clearance Distance (d), (d’)
220 to 240 V ≥ 3mm(d)
≥ 8mm(d’)
Fig. 1
Chassis or Secondary Conductor
Primary Circuit
d' d
Fig. 2
AC Voltmeter
(High Impedance)
Exposed Accessible Part
BOne side of
Power Cord Plug Prongs
Z
AC Line Voltage Load Z Leakage Current (i) One side of power cord plug
prongs (B) to:
220 to 240 V
2kΩ RES.
Connected in
parallel
i≤0.7mA AC Peak
i≤2mA DC
RF or
Antenna terminals
50kΩ RES.
Connected in
parallel
i≤0.7mA AC Peak
i≤2mA DC A/V Input, Output
3-1 TVP_SN
STANDARD NOTES FOR SERVICING
Circuit Board Indications
1. The output pin of the 3 pin Regulator ICs is
indicated as shown.
2. For other ICs, pin 1 and every fifth pin are
indicated as shown.
3. The 1st pin of every male connector is indicated as
shown.
Pb (Lead) Free Solder
Pb free mark will be found on PCBs which use Pb
free solder. (Refer to figure.) For PCBs with Pb free
mark, be sure to use Pb free solder. For PCBs
without Pb free mark, use standard solder.
How to Remove / Install Flat Pack-IC
1. Removal
With Hot-Air Flat Pack-IC Desoldering Machine:
1. Prepare the hot-air flat pack-IC desoldering
machine, then apply hot air to the Flat Pack-IC
(about 5 to 6 seconds). (Fig. S-1-1)
2. Remove the flat pack-IC with tweezers while
applying the hot air.
3. Bottom of the flat pack-IC is fixed with glue to the
CBA; when removing entire flat pack-IC, first apply
soldering iron to center of the flat pack-IC and heat
up. Then remove (glue will be melted). (Fig. S-1-6)
4. Release the flat pack-IC from the CBA using
tweezers. (Fig. S-1-6)
CAUTION:
1. The Flat Pack-IC shape may differ by models. Use
an appropriate hot-air flat pack-IC desoldering
machine, whose shape matches that of the Flat
Pack-IC.
2. Do not supply hot air to the chip parts around the
flat pack-IC for over 6 seconds because damage
to the chip parts may occur. Put masking tape
around the flat pack-IC to protect other parts from
damage. (Fig. S-1-2)
3. The flat pack-IC on the CBA is affixed with glue, so
be careful not to break or damage the foil of each
pin or the solder lands under the IC when
removing it.
To p Vi ew
Out In
Bottom View
Input
5
10
Pin 1
Pin 1
Pb free mark
Fig. S-1-1
Hot-air
Flat Pack-IC
Desoldering
Machine
CBA
Flat Pack-IC
Tweezers
Masking
Ta p e
Fig. S-1-2
3-2 TVP_SN
With Soldering Iron:
1. Using desoldering braid, remove the solder from
all pins of the flat pack-IC. When you use solder
flux which is applied to all pins of the flat pack-IC,
you can remove it easily. (Fig. S-1-3)
2. Lift each lead of the flat pack-IC upward one by
one, using a sharp pin or wire to which solder will
not adhere (iron wire). When heating the pins, use
a fine tip soldering iron or a hot air desoldering
machine. (Fig. S-1-4)
3. Bottom of the flat pack-IC is fixed with glue to the
CBA; when removing entire flat pack-IC, first apply
soldering iron to center of the flat pack-IC and heat
up. Then remove (glue will be melted). (Fig. S-1-6)
4. Release the flat pack-IC from the CBA using
tweezers. (Fig. S-1-6)
With Iron Wire:
1. Using desoldering braid, remove the solder from
all pins of the flat pack-IC. When you use solder
flux which is applied to all pins of the flat pack-IC,
you can remove it easily. (Fig. S-1-3)
2. Affix the wire to a workbench or solid mounting
point, as shown in Fig. S-1-5.
3. While heating the pins using a fine tip soldering
iron or hot air blower, pull up the wire as the solder
melts so as to lift the IC leads from the CBA
contact pads as shown in Fig. S-1-5.
4. Bottom of the flat pack-IC is fixed with glue to the
CBA; when removing entire flat pack-IC, first apply
soldering iron to center of the flat pack-IC and heat
up. Then remove (glue will be melted). (Fig. S-1-6)
5. Release the flat pack-IC from the CBA using
tweezers. (Fig. S-1-6)
Note: When using a soldering iron, care must be
taken to ensure that the flat pack-IC is not
being held by glue. When the flat pack-IC is
removed from the CBA, handle it gently
because it may be damaged if force is applied.
Flat Pack-IC Desoldering Braid
Soldering Iron
Fig. S-1-3
Fine Tip
Soldering Iron
Sharp
Pin
Fig. S-1-4
To Solid
Mounting Point
Soldering Iron
Iron Wire
or
Hot Air Blower
Fig. S-1-5
Fine Tip
Soldering Iron
CBA
Flat Pack-IC
Tweezers
Fig. S-1-6
3-3 TVP_SN
2. Installation
1. Using desoldering braid, remove the solder from
the foil of each pin of the flat pack-IC on the CBA
so you can install a replacement flat pack-IC more
easily.
2. The “ I ” mark on the flat pack-IC indicates pin 1.
(See Fig. S-1-7.) Be sure this mark matches the
pin 1 on the PCB when positioning for installation.
Then presolder the four corners of the flat pack-IC.
(See Fig. S-1-8.)
3. Solder all pins of the flat pack-IC. Be sure that
none of the pins have solder bridges.
Instructions for Handling Semi-
conductors
Electrostatic breakdown of the semi-conductors may
occur due to a potential difference caused by
electrostatic charge during unpacking or repair work.
1. Ground for Human Body
Be sure to wear a grounding band (1 MΩ) that is
properly grounded to remove any static electricity that
may be charged on the body.
2. Ground for Workbench
Be sure to place a conductive sheet or copper plate
with proper grounding (1 MΩ) on the workbench or
other surface, where the semi-conductors are to be
placed. Because the static electricity charge on
clothing will not escape through the body grounding
band, be careful to avoid contacting semi-conductors
with your clothing.
Example :
Pin 1 of the Flat Pack-IC
is indicated by a " " mark. Fig. S-1-7
Presolder
CBA
Flat Pack-IC
Fig. S-1-8
<Incorrect>
CBA
Grounding Band
Conductive Sheet or
Copper Plate
1MΩ
1MΩ
<Correct>
CBA
4-1 A0C76_77DC
CABINET DISASSEMBLY INSTRUCTIONS
1. Disassembly Flowchart
This flowchart indicates the disassembly steps for the
cabinet parts and the CBA in order to gain access to
items to be serviced. When reassembling, follow the
steps in reverse order. Bend, route and dress the
cables as they were.
2. Disassembly Method
Note:
(1) Order of steps in procedure. When reassembling,
follow the steps in reverse order. These numbers
are also used as the Identification (location) No. of
parts in figures.
(2) Parts to be removed or installed.
(3) Fig. No. showing procedure of part location
(4) Identification of parts to be removed, unhooked,
unlocked, released, unplugged, unclamped, or
desoldered.
N = Nut, L = Locking Tab, S = Screw,
H = Hex Screw, CN = Connector
e.g. 2(S-2) = two Screws of (S-2),
2(L-2) = two Locking Tabs of (L-2)
(5) Refer to the following "Reference Notes in the
Ta b l e . "
Step/
Loc.
No.
Part Fig.
No. Removal Note
[1] Stand
Assembly D1 2(S-1) ---
[2] Rear
Cabinet D1 8(S-2), 2(S-3), 2(S-4),
4(S-5), 8(L-1) ---
[3] Rear Cover D1 2(S-6), Stand Bracket ---
[4]
Power
Supply
CBA
D2
D3
4(S-7), CN501,
CN502, CN503,
CN701
---
[5] Tuner
Shield D2 (S-8) ---
[6] Jack CBA D2
D3
7(S-9), CN103,
CN801, CN903,
CN3701, CN3702,
CN3703, CN3704
---
[7] Digital Main
CBA Unit
D2
D3
2(S-10), 7(S-11),
2(H-1), CN3901,
Jack Holder,
Shield Box
---
[8] Function
CBA
D2
D3
2(S-12),
Function Knob ---
[9] Speaker D2 Speaker Holder ---
[10] IR Sensor
CBA
D2
D3 Sensor LED Lens ---
[1] Stand
Assembly
[2] Rear Cabinet
[3] Rear Cover
[10] IR Sensor
CBA [5] Tuner Shield
[7] Digital Main
CBA Unit
[4] Power Supply
CBA
[11] LCD Module
Assembly
[12] Front
Cabinet
[8] Function
CBA
[9] Speaker
[6] Jack CBA
[11]
LCD
Module
Assembly
D2 Separation Sheet ---
[12] Front
Cabinet D2 --------------- ---
↓
(1)
↓
(2)
↓
(3)
↓
(4)
↓
(5)
Step/
Loc.
No.
Part Fig.
No. Removal Note
4-2 A0C76_77DC
[2] Rear Cabinet
[3] Rear Cover
[1] Stand Assembly (S-1)
(S-2)
(S-2)
(S-3)
(S-4)
(S-5)
(S-2)
(L-1)
(L-1)
(L-1)
(S-2)
(S-6)
(S-5)
Stand Bracket
Fig. D1
4-3 A0C76_77DC
[12] Front Cabinet
(S-7)
(S-7)
(S-8)
(S-9)
(S-10)
(S-11)
(S-11)
(S-11)
(H-1)
(S-10)
(S-12) (S-9)
(S-9)
(S-9)
(S-7)
Sensor LED Lens
Function Knob
Speaker Holder
Separation Sheet
Shield Box
[4] Power Supply CBA
[5] Tuner
Shield
[6] Jack CBA
Jack Holder
[7] Digital Main CBA Unit
[8] Function CBA
[9] Speaker
[9] Speaker
[11] LCD Module
Assembly
[10] IR Sensor
CBA
Speaker Holder
Fig. D2
4-4 A0C76_77DC
TV Cable Wiring Diagram
Function
CBA
Power Supply CBA Jack CBA
Digital Main
CBA Unit
IR Sensor CBA
To Speaker
To LCD Module
Assembly
To LCD Module
Assembly
To LCD Module
Assembly
To Speaker
CN502 CN901
CN501
AC Cord
CN102
CN701
CN503
CN801
CN101
CN103
CN903
CN904 CN3701
CN3901
CN3703
CN3702
CN3704
CN905
CN906
CN907
Fig. D3
5-1 LC8.5P(LED)EA
ELECTRICAL ADJUSTMENT INSTRUCTIONS
General Note: “CBA” is abbreviation for
“Circuit Board Assembly.”
Note: Electrical adjustments are required after
replacing circuit components and certain
mechanical parts. It is important to perform
these adjustments only after all repairs and
replacements have been completed.
Also, do not attempt these adjustments unless
the proper equipment is available.
Test Equipment Required
1. NTSC Pattern Generator (Color Bar W/White
Window, Red Color, Dot Pattern, Gray Scale,
Monoscope, Multi-Burst)
2. Remote control unit
3. Color Analyzer
How to set up the service mode:
Service mode:
1. Turn the power on.
2. Press [MENU] button to display Setup menu.
3. Select “Software” in “OTHERS” and press [OK]
button.
4. Press [0], [4], [2], [5], [7], [4] and [ ] buttons on
the remote control unit in this order. The following
screen appears.
Code :
Pic code :
Inch :
MIPS :
************-***-**
**-*******-***-*-**
*** *******
****
Safety : Safety_Non
"*" differs depending on the models.
5-2 LC8.5P(LED)EA
1. Purity Check Mode
This mode cycles through full-screen displays of red,
green, blue, and white to check for non-active pixels.
1. Enter the Service mode.
2. Each time the [7] button on the remote control unit
is pressed, the display changes as follows.
3. To cancel or to exit from the Purity Check Mode,
press [BACK] button.
2. VCOM Adjustment
1. Operate the unit for more than 20 minutes.
2. Set the color analyzer at the zero point calibration
and bring the optical receptor pointing at the
center of the LCD-Panel at a distance of 3cm away
from the LCD-Panel surface.
Note: The optical receptor must be set
perpendicularly to the LCD Panel surface.
3. Enter the Service mode.
4. To enter the “VCOM-2 adjustment mode”, press [3]
button on the remote control unit.
To enter the “VCOM-1 adjustment mode”, press [2]
button on the remote control unit.
5. Press [P / ] buttons on the remote control
unit so that the color analyzer value becomes
minimum.
6. To cancel or to exit from the VCOM Adjustment,
press [BACK] button.
[7] button
Note:
When entering this mode, the default setting is White mode.
Purity Check Mode
[7] button
Red mode
Green mode
Blue mode
Black mode
[7] button
White mode
[7] button
[7] button
White 20% mode
[7] button
Test Point Adj. Point
Screen [P / ]
buttons
M. EQ. Spec.
Color analyzer See below
Figure
Color Analyzer
To avoid interference from ambient
light, this adjustment should be
performed in a dark room.
L = 1.18 inches
Perpendicularity
5-3 LC8.5P(LED)EA
The White Balance Adjustment should be
performed when replacing the LCD Panel
or Digital Main CBA.
3. White Balance Adjustment
Purpose: To mix red and blue beams correctly for
pure white.
Symptom of Misadjustment: White becomes bluish
or reddish.
1. Operate the unit for more than 20 minutes.
2. Input the White Raster(70%=70IRE, 40%=40IRE).
3. Set the color analyzer at the CHROMA mode and
zero point calibration. Bring the optical receptor
pointing at the center of the LCD-Panel at a
distance of 3cm away from the LCD-Panel surface.
Note: The optical receptor must be set
perpendicularly to the LCD Panel surface.
4. Enter the Service mode. Press [ -] button on the
remote control unit and select “C/D” mode.
5. [CUTOFF]
Press [1] button to select “COR” for Red Cutoff
adjustment. Press [3] button to select “COB” for
Blue Cutoff adjustment.
[DRIVE]
Press [4] button to select “DR” for Red Drive
adjustment. Press [6] button to select “DB” for Blue
Drive adjustment.
6. In each color mode, press [P / ] buttons to
adjust the values of color.
7. Adjust Cutoff and Drive so that the color
temperature becomes 12000°K (x
=
0.272 / y
=
0.278 ±0.005).
8. To cancel or to exit from the White Balance
Adjustment, press [BACK] button.
Test Point
Adj. Point Mode Input
Screen [P / ]
buttons
[VIDEO1]
C/D
White Raster
(APL 70%)
or
(APL 40%)
M. EQ. Spec.
Pattern Generator,
Color analyzer
x= 0.272 ± 0.005
y= 0.278 ± 0.005
Figure
Color Analyzer
Perpendicularity
INPUT: WHITE 70%, 40%
To avoid interference from ambient
light, this adjustment should be
performed in a dark room.
L = 1.18 inches
40%=40IRE 70%=70IRE
100IRE
100IRE
0IRE 0IRE
INPUT SIGNAL
Low
Light
High
Light
6-1 A0CN0INT
HOW TO INITIALIZE THE LCD TELEVISION
How to initialize the LCD television:
1. Turn the power on.
2. Enter the service mode. (Refer to page 5-1.)
- To cancel the service mode, press [ ] button on
the remote control unit.
3. Press [ ] button on the remote control unit to
initialize the LCD television.
4. "INITIALIZED" will appear in the upper right of the
screen. "INITIALIZED" color will change to green
from red when initializing is complete.
7-1 LC8.5FW
FIRMWARE RENEWAL MODE
Equipment Required
a. USB storage device
b. Remote Control Unit
Firmware Update Procedure
[Check the current version]
1. Press [MENU] button on the remote control unit to
display the menu mode.
2. Press [ÅK] or [ÅL] to select “OTHERS”, then press
[OK] button.
3. Press [ÅK] or [ÅL] to select “Software”, then press
[OK] button.
The current FW version will be displayed.
[Preparation]
1. Prepare USB storage device.
2. Copy F/W-file (ecc file) to USB storage device.
Note: Make sure to use the blank USB Storage.
3. Rename the F/W-file’s name.
Step1. Add the “_F” at the end of the name.
(If the file name in USB says
“ZF6731915NOS-030-05.ecc”,
the new file name should be
“ZF6731915NOS-030-05_F.ecc”.)
Step2. The 6th and 7th digit of the file name
indicate the size of TV. If the size of your
TV and the file name were not the same,
you must change the file name.
[Update procedure]
1. Plug in the AC power cord.
2. Press [ ] button on the remote control unit to turn
off (standby).
3. Check “STAND BY” indicator (Red LED) lighting.
4. Insert USB storage device with F/W to TV set.
5. Press [ ] button to turn on.
6. After approximately 70 seconds, the following will
appear on the screen and the update begins
automatically.
Note: Do not turn off the TV set and do not
remove the USB storage device while this
procedure.
The update will be completed in about 2 minutes.
And the following screen appears.
7. Press [ ] button to turn off (standby).
8. Check “STAND BY” indicator (Red LED) lighting.
9. Remove USB storage device from TV set.
10. Press [ ] button to turn on.
(Example)
The software upgrade is completed.
Remove USB storage device, turn TV off and then on again.
(Example)
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/